<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>border</title>
    <style>
        .page_content_item{
            width: 300px;
            height: 200px;

        }
    </style>
</head>

<body>
<!--
可以按顺序设置如下属性：
border-width
border-style
border-color
-->
    <div class="test" style="border: 6px solid #00F7DE;background-color: #1E9FFF;padding: 19px;">
        <div style='width:100%; height: 100%;background-color: #5FB878'></div>
    </div>
</body>
</html>